|
The following is my routine for opening a serial port which works very well on the TS-7300. Set the timeout to 0 if you want to wait forever to recieve characters. Don. #include <stdio.h> #include <stdlib.h > #include <string.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> #include <termios.h> struct termios saved_tty_parameters; /* saved serial port setting */ int rt_verbose; int rt_open_serial(const char *port, int baud_rate, float timeout) { /* The following 3 could be parameters. */ int tmp_parity = 0; // no parity int tmp_data_bits = 8; // 8 data bits int tmp_stop_bits = 1; // 1 stop bit /***********/ int fd; struct termios rt_tio; /* open the serial port */ fd = open(port,O_RDWR | O_NOCTTY | O_NONBLOCK | O_NDELAY) ; if(fd < 0) { char buf[60]; snprintf(buf, sizeof(buf), "Opening %s", port); perror(buf) ; exit(-1) ; //return -1 ; } if (0 == isatty(fd)) { printf("This is NOT a tty device, will not set baud rate\n"); return fd; // It is not a tty, you won't be able to set the baud rate } else { printf("This is a tty device\n"); } /* save the old serial port settings */ if (tcgetattr (fd,&saved_tty_parameters) < 0) { perror("Can't get terminal parameters "); exit(-1) ; //return -1 ; } /* set the fields */ bzero(&rt_tio,sizeof(&rt_tio)); switch (baud_rate) { case 0: rt_tio.c_cflag = B0; break; case 50: rt_tio.c_cflag = B50; break; case 75: rt_tio.c_cflag = B75; break; case 110: rt_tio.c_cflag = B110; break; case 134: rt_tio.c_cflag = B134; break; case 150: rt_tio.c_cflag = B150; break; case 200: rt_tio.c_cflag = B200; break; case 300: rt_tio.c_cflag = B300; break; case 600: rt_tio.c_cflag = B600; break; case 1200: rt_tio.c_cflag = B1200; break; case 1800: rt_tio.c_cflag = B1800; break; case 2400: rt_tio.c_cflag = B2400; break; case 4800: rt_tio.c_cflag = B4800; break; case 9600: rt_tio.c_cflag = B9600; break; case 19200: rt_tio.c_cflag = B19200; break; case 38400: rt_tio.c_cflag = B38400; break; case 57600: rt_tio.c_cflag = B57600; break; case 115200: rt_tio.c_cflag = B115200; break; case 230400: rt_tio.c_cflag = B230400; break; default: rt_tio.c_cflag = B9600; } switch (tmp_data_bits) { case 7: rt_tio.c_cflag = rt_tio.c_cflag | CS7; break; case 8: default: rt_tio.c_cflag = rt_tio.c_cflag | CS8; break; } switch (tmp_parity) { case 1: rt_tio.c_cflag = rt_tio.c_cflag | PARENB; rt_tio.c_iflag = ICRNL; break; case -1: rt_tio.c_cflag = rt_tio.c_cflag | PARENB | PARODD; rt_tio.c_iflag = ICRNL; break; case 0: default: rt_tio.c_iflag = IGNPAR | ICRNL; break; } if (tmp_stop_bits == 2) rt_tio.c_cflag = rt_tio.c_cflag | CSTOPB; rt_tio.c_cflag = rt_tio.c_cflag | CLOCAL | CREAD; rt_tio.c_oflag = 0; rt_tio.c_lflag = 0; /*ICANON;*/ if (timeout == 0) { rt_tio.c_cc[VMIN]=1; rt_tio.c_cc[VTIME]=0; } else { rt_tio.c_cc[VMIN]=0; rt_tio.c_cc[VTIME]= (int)(timeout * 10.0); } /* flush the serial port */ tcflush(fd, TCIFLUSH); if (-1 == fcntl(fd, F_SETFL, FASYNC)) { perror("fcntl"); exit(-1) ; //return -1 ; } /* write the settings for the serial port */ if (tcsetattr(fd,TCSANOW,&rt_tio) <0) { perror("Can't set terminal parameters "); exit(-1) ; //return -1 ; } /* flush the serial port */ tcflush(fd,TCIOFLUSH); if (rt_verbose) { printf("serial port ok:\n"); printf("device name %s\n", port); printf("speed %d\n", baud_rate); printf("data bits %d\n", tmp_data_bits); printf("stop bits %d\n", tmp_stop_bits); printf("parity %d\n", tmp_parity); printf("timeout: %f\n", timeout); } return fd ; } On 8/17/06,
weide72 <> wrote:
|